Best place to buy Mopar fluids in bulk?

Macdaddy4738

Macdaddy4738

Well-Known Member
Joined
Jun 1, 2005
Need to do the transmission and diffs on my Gladiator, but I can't find a good source for Mopar fluids, especially the transmission stuff. Everything I've read says to stick with the Mopar tranny fluid (although I suppose it's just like any other). Does Jeep/Stellantis say the transmission is a "lifetime" fluid? Sure, but they're wrong.

I suppose the other question should just be, where does one buy any fluid in bulk? I need to do oil changes on all three of my vehicles and wouldn't mind finding a place that'll sell at a discount for bulk purchases.
 
I buy 5w30 Kirkland synthetic at Costco. That's the best I've come across. I'll buy several cases when it's on sale. Can't help with the Mopar brand.
 
Interested to know how you change the trans fluid in the gladiator. I'm sure there's a method, just aggravated there's not a conventional fill tube
 
The 8 speed is a ZF unit, when I had one in my Ram I remember reading it was best not to shop around for alternatives fluids. That being said, Mopar is probably just rebranding the ZF factory fill.

I think the fluid is green from the factory and you need a scan tool to force the transmission to open the cooling circuit. I watched enough videos on it that I decided this was a job I would farm out when the time came, as I didn't have a lift.


Looks like a bunch of euro parts stores have some of the best prices
 
Last edited:
Clubbs said:
Interested to know how you change the trans fluid in the gladiator. I'm sure there's a method, just aggravated there's not a conventional fill tube
Click to expand...

I bought THIS for it. Adds a fill plug and like an additional quart of fluid.

I've read nothing about forcing any sort of cooling circuit. Everything I've found so far said it's just a standard fill.

ZF recommends a fluid change at 50k. Jeep says it's lifetime but that's kinda bullshit honestly. My warranty was up in like February anyway.
 
Awesome. I see the drain plug, but how do you fill it? Mentions a 1/4" npt plug I would assume for a temp sensor but mine already has a trans temp sensor stock, so is that the "fill" and you pump it in???
 
Clubbs said:
Awesome. I see the drain plug, but how do you fill it? Mentions a 1/4" npt plug I would assume for a temp sensor but mine already has a trans temp sensor stock, so is that the "fill" and you pump it in???
Click to expand...

The transmission does have a fill plug. Somewhere on the passenger side IIRC. The INSTALL GUIDE has the relevant information. I haven't installed it yet, but the quality seems really good for the price. I also ordered their diff. covers because....why not? They also seem quite nice for the price.

EDIT* Reading the install guide in more depth, there's obviously a workaround in the install regarding that transmission cooling circuit.
 
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